> CVE-2026-23897 [HIGH]

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PUBLISHED
2026-02-04 20:16
MODIFIED
2026-02-04 20:16
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.70%
Top 47.3%
DATA SOURCES:
NVD 🔗 2026-02-04 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-10-28 OSV 🔗 2026-02-10

> DESCRIPTION

Apollo Server is an open-source, spec-compliant GraphQL server that's compatible with any GraphQL client, including Apollo Client. In versions from 2.0.0 to 3.13.0, 4.2.0 to before 4.13.0, and 5.0.0 to before 5.4.0, the default configuration of startStandaloneServer from @apollo/server/standalone is vulnerable to denial of service (DoS) attacks through specially crafted request bodies with exotic character set encodings. This issue does not affect users that use @apollo/server as a dependency for integration packages, like @as-integrations/express5 or @as-integrations/next, only direct usage of startStandaloneServer.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-1333

> CWE DETAILED DESCRIPTIONS

CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

> GITHUB SECURITY ADVISORY

GHSA-mp6q-xf9x-fwf7 HIGH

Apollo Serve vulnerable to Denial of Service with `startStandaloneServer`

AFFECTED PACKAGES:
NPM / @apollo/server
>= 5.0.0, < 5.4.0
Fixed in: 5.4.0
NPM / @apollo/server
>= 4.2.0, < 4.13.0
Fixed in: 4.13.0
NPM / apollo-server
>= 2.0.0, <= 3.13.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Apollo Server is vulnerable to denial of service with `startStandaloneServer`

AFFECTED PACKAGES:
Unknown / Unknown
4674 versions affected
ALIASES:
GHSA-mp6q-xf9x-fwf7

> HISTORIQUE DES MODIFICATIONS

Première apparition
04/02/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:00
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cy...
Nouvelle valeur:
CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
📊 ENRICHISSEMENT 01/03/2026 06:46
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cy...
Total des modifications: 2 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/apollographql/apollo-server/commit/d25a5bdc377826ad424fcf7f8d...
https://github.com/apollographql/apollo-server/commit/e9d49d163a86b8a33be56ed27c...
https://github.com/apollographql/apollo-server/security/advisories/GHSA-mp6q-xf9...
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